Bottle adapter



FIG. 1 is a first perspective view of my new invention;

FIG. 2 is a front view thereof, a rear view being identical thereto;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a second perspective view thereof. 

The ornamental design for a bottle adapter, as shown and described. 